After the pop singer took sole credit for her team's big win on "The Celebrity Apprentice" on April 1, Arsenio Hall, 56, lashed out at her.

"I guess it's flattering that I upset him so much," the singer, 28, tells the new Us Weekly (on stands Friday) of Hall, who later referred to "her stank ass" and told teammates, "I Googled her and a naked picture with a gut popped up. F--- her!"